-25.29% is the change from 684 to 511
Calculation steps:
[( 511 - 684 ) ÷ 684] x 100 = -25.29%
Formula
Percentage change = [(511 - 684) / 684] x 100
Subtract the new number by the original number
511 - 684 = -173
-173 ÷ 684 = -0.25292397660818716
-0.25292397660818716 x 100 = -25.29%